Principal Python Developer Derby (Onsite ) £70,000 - £80,000If you''re looking for a Principal-level engineering role where you can drive real technical change while working on critical energy systems, keep reading!In this role you''ll still be building, but you''ll also be making architecture decisions, coaching engineers, and guiding delivery standards across a growing digital capability.The focus is on Back End Python systems that underpin the UK''s transition to sustainable, low-carbon energy. From secure APIs and cloud deployments to DevOps pipelines and data management, you''ll be responsible for ensuring high standards, modern engineering practices, and long-term scalability.What you''ll be doing: Driving technical direction across Back End Python services (Django/Flask)Shaping cloud infrastructure on AWS, Azure or GCP using Terraform and KubernetesMentoring a cross-functional team of developers and engineersWorking closely with product, DevOps, and senior stakeholders to align deliveryEnsuring systems are secure, resilient, scalable and built with long-term maintainability in mind Who they''re looking for: Strong experience designing and building Python APIs in enterprise environmentsComfortable with system architecture, DevOps tooling and infrastructure-as-codeCloud experience with AWS, Azure or GCP (preferably more than one)Someone who''s led teams or coached engineers, but still gets stuck into codeWell-versed in Agile and CI/CD delivery - Git, automated testing, ..... full job details .....